Improvement in stump-extractob



man 1mm No. 65,724, (man JW u. ism.

IMIR()llllliENT IN STUMP-BXTRGTOB..

. dit Stimuli nfrmt tu in this trttcrs ntrnt mit uniting and at tin sume.

TO ALL WHGM 'IT MAY CONCERN:

Be it known that I, GEORGEYCIIAMBERLIN, of Olean, Catt-araugus county, in the State of NewYork, have invented certain new and useful Improvements in Stump-Fullers; and the following is a'fnll, clear, and exact description of the same, reference being had to the accompanying drawings, making n part of this specification, in which- 1 Figure 1 represents a vertical section of the entire apparatus or machine.

Figure 2 shows a detached view of the capsocket and rotating screw-nut.

Figure 3 is a plan or top view of the same.4 v

The-,object of my invention is to facilitate th clearing of land by pulling the stumps with a most convenient, portable, and eilicient apparatus, that will regulate itself to the line of draught on which thegrcatest strain comes, so as always to work easily without cramping, bending, or strainingA the screw or rotating-nut, as the power' is being applied to the lever for operating it.

My invention consists in the arrangement of a. tripod supporting a metal flanged cap or head, in the centre of which is a. ,concave socket and a semispherical or convex washer for a rotating-nut to rest on, in combination with a double-threaded hollow metal screw, the same being provided with an internal rod to give strength and stabilityto the screw above the nut; also in providing an additional centre screw-rod with clutch-hooks, swivel, and pin, or hand-wheel, 'to take up the slack in the chain after bitching to the stump; also in the manncr'ot attaching the lever orlevers to thc rotating-nut, they resting on the ledge or" the cap or head, which `supports the lever or sweep at a uniform distance from the ground, `whether it be on an incline or on a level.

To enable others skilled in the art lto makea'nd use myirrvcntion', I wilt describe it in detail, referring to the drawings and to the letters marked thereon.

I make thetlcrrick of square timbers, of any desired size or height, in the form of a tripod, two of them, A A, having trundle rollers a a in the bottom, the third one, B, having a foot, b, with' a ball-andsocket joint, 12,

.the top ot each being bolted into the metal ilangedvhead C in sockets c c c, cast for them, they beingl supported apart and at suitable distances by the brace-rods d cl d. In the centre of the cap or head C is cast a. semispherical concave socket, e, into which is tted a half ot' a ball washer, E, with a hole through itto allow the double-threaded screw D to move freely. The rotating-nut F being of considerable length stands vertically,

resting-on the ball washer E; the main screw D being held from turning-round when the grappling-chains are I hitched to the hooks f f. 0n about the centre of the rotating-nut F ar'e-trunnions g y, vto which the lever or sweep G is fastened, it having a. support in an inclined position on the rim of the cap or head C, so as to keep the lower end :rt about the same distance from the ground when carried round to operate.- I make the doublethreaded screw D ofi cast iron, and cast the screw-threads on, as well as the rotating box or nut F, being cast in the same manner; and in order that the cast-iron screw D-rnay have the greater strength, and be supported from the top, I cast it on a wrought-iron ro'd, h, or make it hollow and put in a wrought shaft with a. serepr and unt, a', to tighten down upon it at the top. In the bottom of the screw D I t another scrcw,`H, of wrought iron, which extends down and h is a double hook, jj, working on a swivel,.so that the screw II can he turned by the hand-whecl k in the bottoni of the large screw D, and take up allof the slack in the ch'ains which connect the grapples on the stump '.';i h the hooks ffof the' machine.

'lhus it will bc seen that my invention differs from others in that there wil-l bo no side strain on the screws oithe rotating screw-box, the ball-socket allowing it to conform to the 'line of draught in 4any position it. may stand, thc .stulnp'being within the tripod; and also there ismuch time saved in taking up the slack and tightening up the chains by .the independent screw being operated by hand; and another very great advantage is that the lever or sweep that operates to pull the vstump is so connected to the rotating-nut or screw-box, and then having :i firm support on the cap or head; that it will not materiallychange its relative position or height from the ground, although the screw may lean or he carried considerably to onesidc of its bearing. The main screw and the box that it is iitteil into beingl cast' and secured for strength in the mannerebovc described, it will be seen that a cheap, durable, and most eilicient stumppullcr can be supplied.

Having thus fully described my invention, whatl claim as ncw,vnnd desire to secure by` Letters Patent, is-

1. '.lhe metal flange cap or hea l, as constructed, having a concave socket into which is fittedl a convex as and for the purposes herein set'forth.

yWasher to reduce 'the friction, andl allow changing the position ofthe lineof draught on the screw, in th manner .hndfor thepurposes herein described. I 2. I claim the flange-cap Chaud socket 'concave washer E, in combination with th nut F and lever-sweep K, substantially'asianriforl the purposes set forth.

3. I claim the construction of the elast-ron double-threaded screw, with its wrought-ironv central supportingrod, to give strength and durability; as described.

4. I claim the screw-rod-H,`hand-whel 7c, 4and doublehookod swiveljj,

e rotating screw-box or in combination with the main screw D for taking vup the slack in hitching, as specified.

. 5.- I claim supporting the lever-sweep Grl on the rim ofthe flange-cap C, so that it willoperate substantially Witnesses:

E. G. Bnooxs, JOSEPH MILLR.

t' GEORGE CHAMBERLIN. i 

